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2008 International Conference on Microwave and Millimeter Wave Technology最新文献

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Neural network based power amplifier dynamic modeling for wireless communications 基于神经网络的无线通信功率放大器动态建模
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540326
M. Doufana, C. Park
{"title":"Neural network based power amplifier dynamic modeling for wireless communications","authors":"M. Doufana, C. Park","doi":"10.1109/ICMMT.2008.4540326","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540326","url":null,"abstract":"In this paper we present the Neural Network (NN) based dynamic power amplifier (PA) modeling with memory effect. We developed this model with system generator for DSP by Xilinx that could be implemented on DSP chip. The advantage of our system generator based model is to develop highly parallel systems with the most advanced FPGAs, providing system modeling and automatic code generation from Simulink and MATLAB. Our real time modeling method can be adapted for any kind of latest signal type such as cdma-2000 and W-CDMA without any modification of the model and can be adapted to any environmental change such as temperature variation in PA without modify the model. That means our real time model is self adaptable. By using this method we can do a modeling dynamically the non linearity of the PA including memory effects for realistic modulation signals inputs. In this paper, by using our modeling architecture we demonstrate to have an almost same dynamic AM-AM and AM-PM curves of PA.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128244078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Application of the RBF-based meshless method to solve 2-D time domain Maxwell’s equations 基于rbf的无网格方法在二维时域麦克斯韦方程组中的应用
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540505
S. Lai, Bing-Zhong Wang, Y. Duan
{"title":"Application of the RBF-based meshless method to solve 2-D time domain Maxwell’s equations","authors":"S. Lai, Bing-Zhong Wang, Y. Duan","doi":"10.1109/ICMMT.2008.4540505","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540505","url":null,"abstract":"Radial basis functions (RBF), as a meshless technique, is widely applied to solve partial differential equations. In this paper, a meshless RBF method is applied to time domain Maxwell's equations and calculates a two-dimensional (2-D) cavity case. The main idea is that the fields in the space domain are expanded into a series of radial basis functions and are treated with a meshless method procedure, and the time derivatives are still tackled with the customary difference scheme. The 2-D cavity numerical experiment has been used to validate the propose technique.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129345613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Numerical simulation of microstrip circuits using unconditional stable CN-FDTD method combined with preconditioned GMRES 利用无条件稳定CN-FDTD方法结合预处理GMRES对微带电路进行数值模拟
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540566
Y. Yang, R. Chen
{"title":"Numerical simulation of microstrip circuits using unconditional stable CN-FDTD method combined with preconditioned GMRES","authors":"Y. Yang, R. Chen","doi":"10.1109/ICMMT.2008.4540566","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540566","url":null,"abstract":"The increase of the time step size significantly deteriorates the property of the coefficient matrix generated from the Crank-Nicolson finite-difference time-domain (CN-FDTD) method. As a result, the convergence of classical iterative methods, such as generalized minimal residual method (GMRES) would be substantially slowed down. To address this issue, this paper mainly concerns efficient computation of this large sparse linear equations using preconditioned generalized minimal residual (PGMRES) method Some typical preconditioning techniques, such as the Jacobi preconditioner, the sparse approximate inverse (SAI) preconditioner and the symmetric successive over-relaxation (SSOR) preconditioner, are introduced to accelerate the convergence of the GMRES iterative method. Numerical simulation shows that the SSOR preconditioned GMRES method can reach convergence three times faster than GMRES for this structure.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129370019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Efficient analysis of an antenna-radome structure using fast multipole method 天线天线罩结构的快速多极子分析
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540494
Ying Zheng, Xiaowen Xu, M. He, Qing Lu
{"title":"Efficient analysis of an antenna-radome structure using fast multipole method","authors":"Ying Zheng, Xiaowen Xu, M. He, Qing Lu","doi":"10.1109/ICMMT.2008.4540494","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540494","url":null,"abstract":"In this paper, based upon the equivalent principle and surface integral equations, the exact model of an antenna and dielectric radome structure is established by using method of moments (MoM). The equivalent strip-model is used for the thin wire antenna, in order to alleviate the singularities in the meshing process. The ill-conditioned MoM matrix is improved by the preconditioning technique. The fast multipole method (FMM) is used to reduce the memory occupation and accelerate the iteration convergence of the conjugate gradient (CG) method.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129537265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analysis on the RF interference in GSM/CDMA 1X dual-mode terminals GSM/CDMA 1X双模终端射频干扰分析
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540890
Wei Chongyu, Liyong, Yang Wenlin
{"title":"Analysis on the RF interference in GSM/CDMA 1X dual-mode terminals","authors":"Wei Chongyu, Liyong, Yang Wenlin","doi":"10.1109/ICMMT.2008.4540890","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540890","url":null,"abstract":"This paper is to study on the RF design of GSM/CDMA 1X simultaneous dual-mode mobile terminal. First, considering government regulatory requirements, the main RF interference between GSM and CDMA 1X units in the terminal and the required C/N at CDMA unit input for the receiver normal operation is analyzed. Secondly, the C/N at CDMA receiver input under the cases of Co-channel and adjacent channel interference generated by GSM transmission are calculated respectively. Finally, the solution for suppressing the interference of GSM transmission to CDMA in a GSM/CDMA 1X dual-mode terminal design is given and experiment results are shown. With several methods adopted in the real product design, the GSM/CDMA 1X simultaneous dual-mode mobile terminal was successfully developed.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129649752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Calculation of resonating frequency of a rectangular microstrip antenna using Artificial Neural Network 用人工神经网络计算矩形微带天线谐振频率
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540658
V. Thakare, P. Singhal, V. Kushwaha
{"title":"Calculation of resonating frequency of a rectangular microstrip antenna using Artificial Neural Network","authors":"V. Thakare, P. Singhal, V. Kushwaha","doi":"10.1109/ICMMT.2008.4540658","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540658","url":null,"abstract":"A new method of calculation of resonating frequency of a rectangular microstrip patch antennas using artificial neural network (ANN) has been adopted in this paper. The results obtained using ANNs are compared with the simulation findings. The simulated values are obtained by designing the microstrip antenna using IE3D electromagnetic simulator. The ANNs results are more in agreement with simulation findings.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129689319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Broad-band orthomode transducers 宽带正交换能器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540374
J. Yu, C. Jin, Y. Cao, H.S. Chen
{"title":"Broad-band orthomode transducers","authors":"J. Yu, C. Jin, Y. Cao, H.S. Chen","doi":"10.1109/ICMMT.2008.4540374","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540374","url":null,"abstract":"The design and test results of a quad-ridged waveguide L-band orthomode transducer (OMT) for radio telescope are presented. This OMT achieves satisfactory performance using relatively short length compared with other same kind of designs. Measurements of the system in the frequency range 1-4GHz agree well with simulation results. The broad-band return loss and cross-polarization behavior is given where the OMT used is measured in conjunction with a wideband scalar horn.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130363646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Modeling of high power 0.3 THz IMPATT oscillator based on 3C-SiC and growth of 3C-SiC on Si (100) substrate for possible IMPATT fabrication 基于3C-SiC的高功率0.3 THz IMPATT振荡器的建模和sic - sic在Si(100)衬底上的生长，可能用于IMPATT的制造
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540549
M. Mukherjee, N. Mazumder
{"title":"Modeling of high power 0.3 THz IMPATT oscillator based on 3C-SiC and growth of 3C-SiC on Si (100) substrate for possible IMPATT fabrication","authors":"M. Mukherjee, N. Mazumder","doi":"10.1109/ICMMT.2008.4540549","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540549","url":null,"abstract":"The Single Drift Region ( SDR, p+ n n+ type) cubic silicon carbide (3C-SiC/B-SiC) based IMPATT diode is designed and studied for the first time at terahertz (THz) frequency region. The simulation predicts that the device is capable of generating output RF power of 63.0 W with 13% efficiency at 0.330 THz. The effect of parasitic series resistance on the RF power level of the device is further simulated. The presence of series resistance (2.5 Omega) reduces RF power output by 8.7%. The simulation clearly establishes the application possibility of 3C-SiC as a base material for high power THz IMPATT device. Single crystalline, epitaxial 3C-SiC films are deposited on silicon (Si) (100) substrates by rapid thermal chemical vapour deposition (RTPCVD) at a temperature as low as 800degC using a single precursor methylsilane, which contains Si and C atoms in the same molecule. No initial surface carbonization step is required in this method. A p-n junction has been grown successfully and the characterization of the grown 3C-SiC film is reported in this paper.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130372049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Analysis of electromagnetic scattering from a PCB inductor based on wavelet-Mom 基于小波母的PCB电感器电磁散射分析
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540449
Dong Hui, Zhu Yi-sheng, Zhao Bai-shan
{"title":"Analysis of electromagnetic scattering from a PCB inductor based on wavelet-Mom","authors":"Dong Hui, Zhu Yi-sheng, Zhao Bai-shan","doi":"10.1109/ICMMT.2008.4540449","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540449","url":null,"abstract":"Inductor is a very popular device in various circuits. A PCB (printed circuit board) inductor makes its size more compact. When the signal frequency reaches to radio or microwave bands the radiation and scattering from it must be considered. Electromagnetic scattering from a PCB inductor is studied in this paper. Combining Mom with wavelet analysis sparsifies the matrix produced in calculation, which decreases calculation time and saves the computer sources. A Coifman intervallic scarlet on [0, 1] with level 6 is constructed for evaluating the current distribution on the PCB inductor wire. The current distribution and radiation pattern of a circular PCB inductor are given finally.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127016904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A cross-layer adaptive resource allocation algorithm based on impartiality of wait time 基于等待时间公平性的跨层自适应资源分配算法
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540888
Yi Hui, Zhijie Zhou, Rui Hui, Wenqiang Zhang
{"title":"A cross-layer adaptive resource allocation algorithm based on impartiality of wait time","authors":"Yi Hui, Zhijie Zhou, Rui Hui, Wenqiang Zhang","doi":"10.1109/ICMMT.2008.4540888","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540888","url":null,"abstract":"A cross-layer adaptive resource allocation algorithm of multi-user MIMO OFDM systems is proposed and simulated. The aim is to maximize the transmit rate under the constraints of the fixed transmit power and QoS. The algorithm exploits the fair of wait time of each user to allocate subcarriers whose allocation standard is the spatial subchannel whose SNR is best, bits and power of subcarriers and spatial subchannels. Simulation results show that the algorithm can satisfy the fair of wait time and QoS of each user, and the total rate can be increased significantly.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124135467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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